The original Mount Washington ship was built in 1888 to cruise Lake Champain in Vermont it was named the Cheteaguay and was 203 feet long when built. A purchase price of $20,000 in the spring of 1940 was agreed upon, with the boat being dismantled and sent in 20 sections from Shelburne Vermont to Lakeport New Hampshire (was how the Mount Washington came to be in New Hampshire).

In 1982 the ship was once again partially dismantled (cut in half) in order to add 25 feet to her length and thus renaming her as a motor ship (M.S.).

The Mount Washington has hosted many school proms, college outings, weddings and business functions, but the main function is Daytime scenic cruises, Dinner dances and special theme night such as a Halloween cruise. The ships capacity is 1,250 passengers and departs out of Weirs Beach, where tickets can be purchase.